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Other people's express packages are packaged like this:
Our Dongfeng Express packages are packaged like this:
Other people's express packages are delivered like this:
Other people's express packages are delivered like this:
About cross-region freight :
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About Courier Delivery requirements:
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For a long time, Dongfeng Express has always provided high-quality and high-quality services with the concept of customer first and provided high-quality services
1960, Dongfeng No. 1 was successfully launched for the first time.
In 1980, the first full-range flight test of Dongfeng 5 intercontinental missile was a complete success. The Dongfeng 5 Intercontinental Missile has 3.35 meters in diameter , the box uses high-strength aluminum-copper alloy , and the guidance system uses inertial guidance platform , and is equipped with an electro-hydraulic servo mechanism to change the flight direction.
Dongfeng 5 Flight Experiment 1
1982 and 1988, the submarine missile launch test developed by various units of the aerospace system was a complete success.
"Jiu Wave" series submarine missile launch
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Express delivery business scope of the sky, earth and sea
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For the business area scope issues discussed in this article, it is necessary to declare:
Aviation refers to the flight and related activities in the atmosphere that humans use aircraft to engage in. Aircraft , which contains lighter than air, such as airship , and , which is heavyer than air, , such as aircraft, helicopters, etc., will not fly away from the earth. (This article involves very few )
Aerospace is also known as "interstellar navigation". Its aircraft is called outer space aircraft , such as launch vehicle , missile weapons, space shuttle , etc. (This article mainly involves content )
As for the issue of how to deliver express, there are the following express vehicles, express submarine , express rockets, express ship , etc. for customers to choose. Please read carefully, and choose
express delivery tool. The main categories of missiles are:
9
is divided into
ballistic missile / flight missile /space missile/combination missile
The famous Dongfeng-41 is a typical land-based maneuverable solid ballistic intercontinental nuclear missile, which is an important part of the strategic strike module.
Dongfeng 41 nuclear missile team
navigation missile not only uses engine thrust as flight operation force, but also relies on the power generated by the wing surface of missile to support its own mass. Most of the time, is flying along a fixed ballistic in the atmosphere of .
Eagle Strike Series shore ship missile As a solid shield of the coastal defense system, it is an navigation missile , which can strike large and medium-sized surface ships, has great power to attack seas, has quick response and long range.
eagle strike 12B shore missile team
divided by the target of strike
Anti-aircraft missile/ anti-radiation missile / anti-ship missile / anti-submarine missile / anti-submarine missile /
anti-tank missile /anti-missile missile/ anti-satellite missile /
by launch point and the target position are divided into
against ships : ship missile / shore missile / air-ship missile /submarine missile;
against ground : ground-based missile/ship missile/submarine missile/ air-based missile/ air-based missile/submarine missile/ air-based missile /sky missile;
against airspace : surface-based missile / ship-based missile /sky missile/ air-based missile /sky missile;
against space : ground-based missile/sky missile/sky missile/space missile.
Jiulang-2 is a submarine-launched ballistic nuclear missile, mainly carried in new strategic nuclear submarine , and is an important part of my country's "trial-in-one" strategic nuclear power of land-based, sea-based and air-based.
Julang-2Submarine-launched ballistic nuclear missile
The famous "Hongqi-7" is a kind of surface-to-air missile that can respond quickly, resist interference, and deal with multiple targets. The recently emerged accompanying field air defense missile system HQ-17AE is a surface-to-air missile . can not only effectively intercept various fixed-wing aircraft , drone anti-radiation air-to-ground missile, subsonic cruise guide bombs, but also intercept stealth aircraft , supersonic cruise missile and rocket .
HQ-17AE air defense system
Now with the integration of aerospace and gangsters, new weapon systems have emerged, such as:
Rainbow-4 UAV can not only perform battlefield reconnaissance missions , collect enemy combat information, or can also launch missile attacks on enemy targets . There is a reconnaissance system under the nose, and there are two weapon mounting devices under the wings on both sides, which can mount missile weapons. Then Rainbow-5 also successfully tested the flight.
Rainbow-4 UAV mounted bomb test task
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High-end hardcore express delivery tool
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Let’s get to know the super powerful express delivery tool
(cover high-end physics, chemistry, Materials, computing and other disciplines)
missile basic composition system
power device
For power system , most missile systems currently use solid rocket engine , the main features are:
simple structure and high reliability . Compared with liquid rocket engine , does not require special storage tanks, complex conveying systems, adjustment systems and injection systems .
is simple to maintain and has strong response capabilities . solid propellant can be stored in the engine for a long time after charging and forming. Therefore, the long-range precision strike missile using solid rocket engines is always in a waiting state , and can be launched with a simple operation. Before launching the liquid rocket engine, it is necessary to conduct a comprehensive inspection of the gas path , liquid path and circuit system.
propellant high density . Due to the high propellant density, can reduce the volume of solid rocket , reduce the structural quality of rocket engine , thereby improves the flight speed .
Experience the complexity of the load condition of the liquid rocket engine by yourself
:
typical structure and mechanical characteristics of the rear swing liquid engine of the large thrust pump. This type of liquid rocket engine is a complex structure composed of thin-walled interlayers, space-oriented pipelines, high-speed rotors, space trusses and other components with different mechanical properties such as components with different mechanical properties such as thin-walled mezzanines, space oriented pipelines, high-speed rotors, and space trusses. Compared with the above liquid rocket engine, the solid rocket engine can be simplified to consist of three parts: shell, lining layer, and propellant column . It can be clearly seen that the solid rocket engine has the advantages of simple structure, easy maintenance, and high reliability.
solid rocket engine structure diagram, the internal structure is simple, consisting of propellant column, artificial debonding, lining and engine housing of a certain geometric shape , and is composed of
solid combined power rocket engine is a type of power form derived and developed based on solid rocket engines, combined with other aspirated power . Currently, it mainly includes technologies such as solid ram engine and solid scram engine .
solid ram engine principle diagram
In addition, in order to increase the aircraft's penetration ability , solid-liquid mixed rocket engine can enable gliding aircraft to have power to fly in the atmosphere for a long time. According to the lift requirements of different flight states of the aircraft, different thrusts can be provided at any time, and can also adapt to complex flight actions such as jumping maneuvers, with rich ballistic forms.
Typical extruded solid-liquid rocket engine diagram 11
At this stage, higher requirements have been put forward for the missile hit accuracy. Advanced performance guidance systems such as mm wave guidance, laser guidance, infrared imaging guidance, scene area-related guidance and GPS/inertial navigation combination navigation technology have been further developed and widely used in advanced missile weapons.
sea combat scenario diagram, showing that the missile weapon system faces an increasingly complex battlefield electromagnetic environment under modern information battlefield conditions.
guidance system
Take infrared guidance as an example. At present, the detector of mainstream infrared seeker works in medium and far infrared band . Various infrared imaging guidance weapons use multi-spectral imaging technology. The loss of images in some bands does not affect the continued tracking and identification of targets. improves the weapon's anti-interference ability and battlefield adaptability .
air-to-air missile infrared guidance seeker
missile control system includes two parts: guidance system and control system :
guidance system is used to measure or detect missile relative target and launch point position , form guidance instructions according to the required ballistic form, and send guidance instructions to the control system. The remote precision strike missile guidance system is usually composed of motion sensor and guidance instruction forming device , etc.
control system responds to the command signal from the guidance system, forces the missile to change its course , causing the missile to fly along the required ballistics. Another important task of long-range precision strike missile control system is to ensure that the missile can fly stably in every stage of . The long-range precision strike missile control system is usually composed of missile attitude sensitive originals, control surface position sensitive components, actuation devices and control surface , etc.
For example, laser gyroscope can use a ring laser to rotate in the inertial space to produce a frequency difference effect as the forward and reverse beams of light rotate with the rotation to measure the angular velocity or rotation angle of an object relative to the inertial space.
high-precision laser gyroscope
warhead is the part of missiles completing basic combat tasks. According to the type of charge, it can be divided into conventional warhead, special warhead (biology, chemistry) and nuclear warhead ( atomic bomb head, hydrogen bomb head, neutron bullet head) .
, initiation system is also an important subsystem, and its task is to choose the most favorable opportunity to destroy and destroy the target . In actual design, the volume and mass of each subsystem of long-range precision strike missile should be minimized as much as possible, while leaves a larger space to the warhead , which is the missile payload, so that the warhead mass can be as large as possible so that the target being attacked will be damaged and damaged as much as possible.
Dongfeng 26 missile can be equipped with both conventional warhead , as well as nuclear warhead , which is the transformed warhead.
Dongfeng 26 nuclear common missile team
Engine body
Engine body Configuration design ultimately provides a perfect aerodynamic shape , reasonable part arrangement and lightweight and high-strength structural layout, and it also needs to choose appropriate structural materials.
Basic appearance design should consider as much as possible:
makes full use of the best wing body interference, interplane interference, and interference between plug-ins and wing body, and designs the appearance layout of with the maximum lift-resistance ratio of ;
meets the requirements of long-range precision strike missile mobility, stability and manipulation ;
meets the stealth requirements, making radar scattering area . ;
………
In the actual design, the aerodynamic layout form and location arrangement should be used to refer to the aerodynamic characteristics of the original quasi-missile to ballistic estimation , and then the main parameters such as speed characteristics, available overload value, maximum balanced angle of attack and static stability indicators are drawn based on the ballistic estimation results. They are compared with the required design value and modify the appearance design. Then, based on the appearance design results, re-calculate the aerodynamic characteristics calculation, missile mass, center of mass, moment of inertia, ballistic calculation, etc. . Repeat this until satisfactory results are obtained.
Sometimes, in order to verify the aerodynamic performance of missile bodies, also requires wind tunnel experiment .
wind tunnel test model
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The express company that always progresses
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The last explanation: Dongfeng Express Company is a express company that is constantly progressing, constantly improving, and keeps pace with the times
With the advancement of various technologies, various systems of missiles are also developing at the same time. For example, the recent new metal material zirconium-based amorphous alloy ( metal glass ) , which can show the characteristics of shear fracture under compressed load, that is, "self-sharp" effect .
zirconium-based amorphous alloy under compression conditions "self-sharp" effect
can be used as a new anti-tank missile warhead material - tungsten wire /zirconium-based amorphous composite material
zirconium-based atomic structure comparison diagram. On the left is an disordered amorphous atomic arrangement structure (can represent the atomic arrangement structure of the zirconium-based amorphous alloy matrix), and on the right is an ordered crystalline atomic arrangement structure (can represent the atomic arrangement structure of the tungsten wire) (can represent the atomic arrangement structure of the zirconium-based amorphous alloy matrix), and on the right is an ordered crystalline atomic arrangement structure (can represent the atomic arrangement structure of the tungsten wire) (can represent the atomic arrangement structure of the tungsten wire) and on the right is an ordered crystalline atomic arrangement structure (can represent the atomic arrangement structure of the zirconium-based amorphous alloy matrix). On the right is an ordered crystalline atomic arrangement structure (can represent the atomic arrangement structure of the tungsten wire). On the right is an ordered crystalline atomic arrangement structure (can represent the atomic growth of the tungsten wire). Strong atomic arrangement structure)
80% volume fraction tungsten wire/zirconium-based amorphous composite material cross-section
tungsten wire/zirconium-based amorphous composite material made of abrasive-piercing bullet warhead
large length-to-diameter ratio tungsten wire/zirconium-based amorphous composite material penetrates 30CrMnMo alloy steel target crater
even super-strong alloy steel plates, tungsten wire/zirconium-based amorphous composite material is gradually verified as a new generation of armor-piercing materials.
After reading the above introduction, how do you feel about your dear customers?
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Dear, remember five-star praise
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References
1. https://mp.weixin.qq.com/s/eOs8z9zbBmKRRK2KpHPArg
2. https://mp.weixin.qq.com/s/mLXPAxEfAsNJ45N8HBVDjg
3.https://mp.weixin.qq.com/s/6trORKIzhOymB0TxzNFXKg?exportid=export/UzFfAgtgekIEAQAAAAAAJDECBJC4ywAAAAAAstQy6ubaLX4KHWvLEZgBPEm6M0S38jbOr8zNPgMIv5YvdkI_ff0-kY5QynQpEL
4. https://mp.weixin.qq.com/s/ZypIw5esKiqDZbYifvr8HA
5. https://mp.weixin.qq.com/s/wfcVL3wKoukHRSpPBX1lUw
6. https://mp.weixin.qq.com/s/MvtdPCBlF3q92ijhJun_4A
7. What is in the belly of the missile? China Aerospace Science and Technology Industry Video Number
8. Li Bin, Yan Song, Yang Baofeng. Mechanical problems in the structure of large-thrust liquid rocket engines [J]. Mechanical progress, 2021, 51(04):831-864.
9. Qu Kai, Xing Yaoguo, Zhang Xudong. Pharmaceutical column fatigue damage of carrier-based solid rocket engines under the action of swaying loads [J]. Acta Aerodynamics, 2011, 26(11):2636-2640.
10. Tian Weiping, Wang Liwu, Wang Wei. Key technical problems faced by solid rocket engine technology [J]. Solid Rocket Technology, 2021, 44(01):4-8.
11. Hou Defei, Wang Pengfei, Sun Yongqiang, Cao Xiwei, Xu Wei. Research progress of solid-liquid mixed rocket engines [J]. Overall Aerospace Technology, 2019, 3(05): 50-60.
12. Tang Mang, Zhang Jiangnan, Wang Xin, Chen Fei, Rong Jianggang, Shu Ting. Review of anti-interference intrafield test methods for radar-guided missile weapons [J]. Modern Radar, 2021, 43(08): 9-15.
13. Liu Zhen, Wu Xinyuan, Chen Shichao, Wang Weiping, Hu Xiaoming. Analysis of the development of typical infrared precision guided weapons [J]. Journal of Arrows and Guided, 2022, 42(01): 19-27.
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15. Xue Jie, Li Xiaohui, Cheng Yangmin. Research on the application of wings in the aerodynamic shape of tactical missiles[J]. Journal of Arrows and Guided, 2019, 39(06):13-16. Z.H. Han, L. He, Y.L. Hou, J. Feng, J. Sun. Understanding the mechanism for the embrittlement of a monolithic Zr-based bulk metallic glass by oxygen.Intermetallics 17 (2009) 553–561
17. Wang W. The nature and properties of amorphous matter. Progress in Physics. 2013;33:177-351.
18. Du Zhonghua, Du Chengxin, Zhu Zhengwang, Xia Longxiang. Experimental study on long rod elastic core armor piercing of tungsten wire/zirconium-based amorphous composite material [J]. Rare Metal Materials and Engineering, 2016, 45(05):1308-1313.
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Cover source: China Aerospace Science and Technology Weibo
Editor: Jinli
